3-methylthiopropionate is one of the metabolites of methionine (especially of D-methionine). Cultures of Streptomyces lincolnensis accumulated 3-methylthioacrylic acid in amounts directly related to the concentration of methionine in the medium. The first intermediate in the pathway may be the keto acid which is then oxidatively decarboxylated to 3-methylthiopropionic acid.

Val-Gly-Ser-Glu (NSC 350591) is an ECF-A tetrapeptide. Val-Gly-Ser-Glu dose-dependently increases the number of human eosinophils, but not neutrophils, rosetting with complement-coated sheep erythrocytes (EAC3b).

[Gln22] -β- Amyloid (1 - 40)